The balancing act between Ukraine and more normal sources of market movement continues to cause volatility for markets in general.  The effects on mortgage rates have been better-enabled by the relative absence of significant domestic economic data.  Complicating matters further, the only time that geopolitical risk wasn't having an obvious effect on rates, just happened to coincide with the only recent significant data earlier this month with the Employment report on March 7th.
That employment data made for a convincing head-fake toward higher rates and renewed geopolitical risk brought rates back down in the following week.  The point is that significant domestic data hasn't really had to compete with geopolitical risk for the same stage.  They've been taking turns, as it were. 
The first good chance for this to change arrives tomorrow.  There's no way to be sure it WILL change, but tomorrow's Fed policy announcement always has the potential to move markets, and it comes one day after news of gunfire and wounded Ukrainian military at an army base in Crimea.  It's hard to imagine Ukraine-related headlines will simply take the day off tomorrow.  The Fed certainly won't.